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Review Process for Standards Scientific studies on health and environmental effects EPA Integrated Science Assessment (ISA) EPA Risk/Exposure Assessment (REA) + Policy Assessment (PA) Scientific peer review of published studies Reviews by CASAC and the public Public hearings and comments on proposals Proposed Decision Final Decision Ozone final decision around the end October 2010

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Summary of results on time outdoors n Evidence that l Air pollution sensitive asthmatics reduce time outdoors on code red days (based on daily diaries) l 30+ minute reduction in time outdoors on Code Red day relative to non-Code Red day Source: Carol Mansfield, RTI